I'm glad you liked the game and thank you for the feedback!
These are all great suggestions. Unfortunatly I ran out of time to implement everything I wanted / more polishing. The plan at first was to make a large map with different areas and checkpoints but that was way overscoped for the limited time I had left. In the end I went for a smaller map with no checkpoints.
I agree that it is annoying to kill the same enemies over and over. I was thinking of making the enemies less likely to spawn depending on how many times they had been killed but idk, you can kill them faster once you get some items.